Milking-machine.



No. 340,510. PATENTED JAN. 8, 1907.

H. P. DJOHLHAVER.

MI'LKING MACHINE.

APELIOATION FILED JUNE 11, 1906.

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MILKING MACHINE.

APPLICATION FILED JUNE 11, 1906.

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fllta may No. 849,510. PATENTED JAN. 8, 1907.

H. P. D. OHLH-AVER.

MILKING MACHINE. APPLICATION FILED JUNE 11, 1906.

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HINRlUl-tPElElt DIEDRIUH OHLHAVER,-HO F SAUDE, NEAR BER (ilGDORh,

GERMANY. l i

MII KING-MACHIYNE.

Specification of Letters Patent: Application iiled Julie 11,1906.fieriai No. 321,172.

Patented Jan. 8,1907.

This in\-'cntion relates to improvements in the construction ofinilking-machines in. which. a separate pump-and suction-passage is usedfor each teat of the animal being milked.

Such machines hitherto have been provided with an air-passage containinga regu lating-"wtlvc, which passage has connected together the spaces oneach side of the nonreturn valve, so that air could pass i'rom the pumpside of the non-return valve to relieve the vacuum in thesuction-passage Since, however, during the suction-stroke of the pumpthis ainpassage formed a supplementary inlet for the milk to the pump,it was found that sooner or later the whole object of the valve wascompletely frustrated by the deposit of milk St'ldllllflliS on thevalue-face, which blocked up the passage. As soon as this happened thewhole machine was useless as lc ading to danger to the animal and theimpossibility of milking her on account of the pain caused by theexcessive suction.

The object of this invention is to provide a suctlon-regulatmg device onmachines of the character described .which shall be easy ofmanipulation, capabh of accurate adjust.

ment over a onsidcrablc range of pressure,

and especially which shall not get out of 0rder from the causes. aboveset out. These objects are attained by the mecln-mism illus trated inthe accompanying drawings, in which-- l Figure 1 is a view of one of thesection, showing the position of the valves with the piston on itsinward stroke. Fig. 2 shows the same pump with its piston on its outwardstroke. Fig. 3 is an enlarged view of the air-regulating device, andFigs-4 and 5 show the air-regulating device in Fig. 1 applied to otherparts of the passage between the teat and the non-return valve. Fig. 6shows a-coniplete machine having four pumps, eaclij fpne connectedseparately to one tea Since no machine of this class is of-any usewithout means for permanently adjusting the suction efl'ect, having, norisk of its changing after continued use, it is of the utmost mmortancethat nothing but the air requlred should pass through the passage ororifice,

and this method consists in constructing the suction-regulating deviceso that one end of the passage is always open to the outside atmosphereand the other end thereof is con nected to the suction-passage somewherebetween the non-return valve and the teat of the animal. By thismeansafter' the pump is fully at worksince the suction-passage 1s alwaysunder the influencepf a partial vacuum no milk will tend to pass .outthrough the air-passage, while air will always tend to entertherethrough. Only a very small ori-- iice is allowable, and if it couldbe accurately gaged a simple orifice would be sufiicient; but since itis also of essential importance in this class of machine that the vacuumshould be kept within certain limits and may have to be varied fordifferent animals it is preferable to provide a device capable ofregulating the size of the inlet with great nicety in proportion to thevolume of the pump and other conditions. l

- As before mentioned, there is a separate pump and accessories to each.teat-being four pumps for a cow and these may" be drivenhy any ordinarymeans that is suitable for the Fig". 6. 1

Referring to Fig. 1, it will be seen that an air-passage (Z is formed ina lug on the valvebox 76 and is provided with a screw eyhaving out alongone side thereof the slot This purpose, such as that shown in slot,shown in Fig. 3, is deep at the end and tapers up to nothing, and beinga e thread on the screw 0 one turn of the screw makes but a very smalldifference in the size 01 the air-oril'icef It will further be seen thatthe opening at being into the passa e between the valve q and the teatit is admitting air to a partial vacuum,. and no milk will tend to exudetherethrough no matter in which direction the "ig. 4 shows theregulating device (as in Fig. 3) applieddirectly to the teat-cup, andFig. 5 shows the same. device applied to a. socket in theconnecting-pipe. In both always piston is me vthese casesthe:t'egulation is obtained in the same Way, and the question of'position1s merely one of convenience.

L am aware that prior to my invention milking-machines have been made,as before mentioned, with an. air-passage and a regulating-valveoperating in conjunction with a non-return valve and with a separate pitmp to each teat. I therefore do not claim sneh a combination broadly;but

What I do claim as my invention, and desire to secure by Letters Patent,is-- In a milking-machine, the combination with a multiple-suction pumphaving a separate barrel, outlet-tube, suctioinpassage, and

teet-cup, to each teat of the animal, of-a non.- return valve interposedbetween. the pump and the suction-passage, and an air-regnlat ingpassage, or Orifice, connectingthe suctionmneeege between the non-returnvalve and the teat with the external air,'so that the i nlh w ill notexude theretlnough. owing to the vacuum in the suetion-passage 7.. Inniilkinganachine, the combination. with alnult-iple-snetion pump havinga separate barrel, ontlet-tube, suctionmesa and teat-cup, to each teatof the animal, 0 a nonreturn valve interposed. between the pinup and thesuction-passage, an air-regulating passage connecting the suction-pasagobetween the non-return valve and the tent with the external air, andmeans for r dating the size of the said passage so that the suctionetlect can be regulated Without the milk com ing intocontact with theregulatin; means.

- In a milking-machine, the conibiimtion with a niultiple-snotion pumphaving a separate barrel, on tlettubo, suctionginseng, and teat-cup, toeach teat of th 1 animal, of a nonreturn. valve interposed between thepump and the suction-passage, an air--11 ilatiii g paaeege connectingthe sintion pne.zng e between the :nonaeturn valve and the teat Wit 2;

the external air, a regulating-serew adjuetable in the said passage, anda tapered slot on v the side of the regulat -screw lien-by tinsize ofthe passa; e can b 3 varied and the saw-- tion re ulated for each teat,substantially m: described.

In testimony whereof l have aliixed my si nature in presence of twowitnesses.

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Witnesses:

OTTO W. Hniiwmion, Ina Cnn sr. llllamnmnnn.

